[Btrfs-devel] Initial Planning document for multiple device support

Chris Mason chris.mason at oracle.com
Tue Jan 22 06:01:50 PST 2008

On Tuesday 22 January 2008, sftf wrote:
> CM>
> http://oss.oracle.com/projects/btrfs/dist/documentation/btrfs-volumes.html
> Allocation Record is similar to LVM's physical extent (PE)

Allocation record is a somewhat generic term.  But, devices will have trees 
recording which space is used, and in that sense it is similar to a PE

> Storage Chunk is similar to LVM's logical extent (LE)


> Storage Chunk1+Storage Chunk2+Storage Chunk3+... is similar to LVM's volume
> group (VG)
> And filesystem use aggregation of Storage Chunks directly to store metadata
> and data on them.



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